Crushing and pulverizing machine



Dec. l2, 1933. E. E. ELzEMr-:YER ET AL CRUSHING AND PULVERIZING MACHINEFiled Nov. 9. 1931 2 Sheets-Sheet 1 5%! lll/4km..

Dec. l2, 1933- E. E. ELZEMEYER Er AL l 1,939,256

CRUSHING AND PULVERIZING MACHINE Filed Nov. 9, 1931 2 Sheets-Sheet 2@Trap/v? vnu/MP5 A disclosed in our co-pending application,

Patented Dec. 12., 1933 CRUSIIING AND PULvEmzING MACHINE Edwin E.Elzemeyer and Henry C. Griesedieck, Webster Groves, `Mo., assignors toAmerican Pulverizer Company, St. Louis, Mo., a corporation of MissouriApplication November 9', 1931.

1 Claim. (C1. ss-n) Thisinvention relates generally to crushing andpulverizing machines and has more particular reference to crushing orpulverizing apparatus of the rotary hammer or ring type. 'Bf Ourinvention has for its chief object the provision, in a machine of thetypestated, of a pivotally swingable grinding surface and readilyoperable means for conveniently, efficiently, and positively shiftingvthegrinding surface adjusti ably relative to the hammer mechanismof themachine, as may be desired in the vparticular grinding or pulverizingoperations being carried And with the above and other `objects in view,"2 our invention resides in the novel features of form, construction,arrangement, and combination of parts --hereinafter described andpointed out in the appended claim.

In the accompanying drawings (two sheets) Figure 1 is a side elevationalview, partly broken away and in section, of a crushing or pulverizingmachine embodying our invention;V

Figure 2 is a fragmental side elevational view of the lower portion ofthe machine; vand Figure-3 is a fragmental half rear-elevational view,partly broken away, of the lower -portion of the machine. s 4

"Referring vnow more in detail and by reference characters toV thedrawings, Y which illustrate a' preferred embodiment of our invention, Adesignates the base casing-section or frame of a crush-- ing orpulverizing machine, which includes opposed upstanding side-walls 1, arear end-wall 2, and a frontend-wall 3,2andB designates a re- 485movable cover or upperncasing-section including a feed hopper 4. i

C designates the hammerV mechanism of the machine, which is disposedforrotation between the casing-sections A, B, and preferably, in the'144)1l present instance, includes a shaft 5 journaled in bearings 6supported by means of suitable brackets 6' projecting fromV the casingside-walls 1, to which shaft is suitably keyed a carrier 'Z havingpivotally connected thereto for rotation therewith 1451"- a plurality ofhammer assemblies each including a pair of bails 8 connected by a pin 9,eachpin 9 supporting a cylindrical hammer 10 mounted loosely in the bailfor rotation with and relatively to, the carrier 7,v as more fully andparticularly for Letters Patent for Pulverizing machine, filed December20, 1930, Serial No. 503,749, to which reference is made.

D designates generally the main grinding-surface of the machine, whichis composed, in the serial No. 573,920

present instance, of a more or less tangent breaker plate 11 leading:from a fixed feed-plate 12 disposed in the hopper 4, the plate 11 at itslower margin being'preferably slightly curved or arcuate'to smoothlymeet an adjoining series of transversely'arcuate contiguous concaves orVgrinding plates 13, each of the plates 11, 13, longitudinally extendingsubstantially the width of the casingsection Afbetween the side-walls 1thereof and being suitably removably attached to, and supported by, acradle or backing-frame E, sometimes called a plate-cage.

The cradle or cage E, in turn, includes a bodysection 14 havingdepending side-marginal flanges 15 enlarged at their respective upperends to provide hubs 16 for connection, forpivotally supporting the`cradle or cage E, with a transverse shaft' 17 supported by andbetweenthe casing-walls 1 adjacent the upper forward corner thereof beneath thehopper 4.

So supported, the cradle body-section 14 swingably depends in agenerally concave or downward curvilinear direction rearwardly under theham-r mer-mechanism C for adjustable movement of the supported grindingsurface D, as a whole, relatively both to the paths ofthe `hammers 9andfto the casing-section A.

On its rearward end, theycradle-body .14 carries a detachable cradle-endsectionor so-called cage-extension 18 adapted to support a sectionalplate 13 and provided at its-opposite longitudinal endswith dependingforwardly oblique arms 19 each'having' a forwardly curved slot 20centered on the rod 1'7 for working'over studs-21 suitably projectingfrom the adjacent casing-walls 1 for guiding the cradle E in shiftablemovement.

The described grinding surface D and cradle E are more fully andparticularly described in ou!` co-pending application for. LettersPatent for 1 Pulverizing machine, filed November 16, 1930, Serial No.494,659, to which reference is hereby made. Hence further descriptionthereof is here omitted.

The grinding clearance'between the hammers 10 and plates 11, 13, mayhence be suitably altered or adjusted by shifting the cradle E, asconditions may require, which adjustment is accomplished in the presentinstance by mechanism now to be described. v j

Such mechanism includes registering apertured lugs or bosses 22dependingly formed in cradleintermediate position on the cradle-bodyflanges 15 parallel with the cradle-supporting rod 1'7. Outwardlyprojecting from the casing side-walls 1, are bosses 23 provided withoblong slots 24 11g portions engaged by suitable retaining members ornuts 26, as best seen in Figure 3.

Disposed on opposite sides of the casing A and journaled on theprojecting ends ,ofthe rodsw25 intermediate the nuts 26 and the bosses23 for normal frictional engagement therebetween, are eyes or hubs 27formed on the forward endsofv respective elongated draw-bars orcradle-shift` ing members F, each of which extends, approximatelytangentially to an .arc-centeredion the pivot-rod 17, in upward rearwardinclined direction through a suitable slot 29 providedy in therespective bearing-bracket 6 and `endwise Aterminates ina. screw-endorthreaded portion 30 longitudinally shiftably engaged in and throughvlug or bracket 31 outwardlyy a suitably'apertured projectingA from theupper rear corner of the respective/casing-side wall 1, suitablythreaded members'or nuts 32 engagingthe screw-ends 30 for bearing on theopposite sides of the respective lug 31 for,adjustab.1y retaining thedrawbar F inshifted position therein. Y e Asbest seen in Figures 1 .and3, apair of suitably spaced anchor-boltsfi, provided with eyes 3.5Yengaging the rod ,2.5, are projected endwise therefrom through, thecasing front-wall 3 and have threaded .thereon suitable nuts 36 adaptedfor impingement ,upon the wa1l3 for opposing the pull'of the draw-bars Fon the rod 25 for initially tensing` the straps and thus rigidlysupportingthe grinding surface-structure for most eiectively preventingundue vibration in the machine when the lattextisinruse.

' f In use and, operation, on loosening the nuts 26 on therod 25,` andif necessary or desirablealso shifting the nuts 36 -forslackening theanchorbolts 34, the cradle E may with, ease and facility be adjustablyswung towards or from the hammer mechanism C by suitable manipulation ofthe nuts 4.B2-,on the'draw-bars F forY shifting the same intheeasing-supported lugs 31.

In ,such manner,` adjustments of the, grindingsurface D` may `beVeieotedfy in a simpleyfa'cile, and` convenient manner, which, beingaccomplishefl,l the grinding-surface D may` be. secured 1n. itsrespective, adjusted position .by vjamming with certainty andexactitude, and that variations in the grindability of material fed tosuch a machine Vmay with nicety and prociency be compensated for byprecise manipulative adjustments of the grinding surface.

It will beunderstood'that changes and modif cations in the form,construction, arrangement, and combination of the several parts of themachine may be made and substituted for those hereinshown Iand describedwithout departing from the nature and principle of our invention.

Having thus described our invention, what We claim and desireto securebyLettersPatent is.-

In a machine of ,thel classv described; in combination, ajcasing havingopposed side-wallsfeJ shaft supported by and extendingV transverselybetween said walls, agrinding-concave withinthe casing, side marginalflanges Yonthe concave engaging said shaft for pivotally supporting theconcave at amend for swingablemovement, said walls being provided withregistering slots tangent to an are centered on said shaft-means foradjustably supporting the concave at its4 free end relatively to thecasing, said means including bosses depending from the concave-dangesand. apertured in; parallelism with saidhaft.` a transverse rod havingits. opposite fend-portions disposed through` the aperturesofsaidbossesiand projecting forr movement in saidslots, apertured lugs fixedon the casing-side walls Ain spacedrelation to and disposed in `a planespaced upwardly from the horizontal plane o,f,said slots, draw-barsdisposed obliquely alongl thede walls. ofv the casing in a plane alsotangent to an are centered on said-shaftsaid bars having connection :atan end with saidrodl otlierzends for longitudinal shiftable movement inand through, said lugs, and, securing members for engaging .the bar and,lugs,A and -means'including an. anchorebar havingl engagement ywith lsaid rod extending inopposition to the drawbar' forA engagement with.the front wall of the lcasing for tensioningA the conavegainst vibra-ition. A ,v fr 1 ;Y

HENRY- C.. ,GRIESEDIECK. EDWIN L E. 4ELZEMEYER.

